Here's a an example.... These 2 prints were printed back to back. The one on the right was orientated left-to-right on the print bed and the print on the left was rotated 90 degrees and re-printed. As you can see, both stopped at different heights during the print. `Michael Thanks for this answer!

I apologize for bumping this old thread...just my two cents... Gluing plastics can be difficult. To know what kind of glue will work typically requires knowing what type of plastic you are dealing with And there are so many types of plastic - vinyls/pvc, ABS, acrylic, styrenes, lexan(polycarbonate),...